Created for professional applications, our Procell batteries offer dependable, long-lasting power. These batteries meet the standards of durability and longevity that professional users demand and expect. And because Duracell is the #1 preferred brand of parents, pharmacists, and first responders, you know it’s a battery you can trust. Guaranteed for 7 (5 of 9V) years in storage with reliable operation in extremes from -4°F to 129°F